Burnishing and refitting tool for bearings



May 3, 1927. 1,627,152

C. E. DE WITT Filed Dec. 2o, 1923 HIIIEIIIIII! umn-lulu f y' l? Patented lMay 3, 1927.

e, UNITED STATES cuantas am wmnoapaptas Trias; Assieaoafmev. Hf. saawoon mauritanien, ING loo., or LYNN, Massncnnsmfrs A coRaon'A'rIoN "or MASSACHU'STTS.

A1,627,1-5? PATENT o1-F1 ce.. i

BUnNrsmNs AND nnirrr'rmdronron isnanrNes.

`Application. ledrlnecenber 20, 19523'.` Serial No. 5618151895. i

This invention `relates .to tools `used in metal working and win that `connection yit relates more particularly 'to andevio'e for vre- 4fitting and burn'ishing vehicle motor bearings and the like.

An object of the invention yi-s .to provide a device as'outlined which Will'wear away the metal in theprocess of enlarging a bore or recess, in variouslparts of machinery,por inenlargling, re'iitting .and smoothing a bearing in motorl vehicles, instead fof cutting it by revolving. knives las vis customarily done.

The invention thus insures a more accurate means for accomplishing its purpose. The invention is particularly useful in working soft metals such as aluminum, Babbitt and the like, as where knives are used, any rough or blunted portion of the blades makes a pitted and scarred surface.

The improved device embodyin the ins vention will be clearly understoo by reference to the following description taken in connection with the accompanying drawings forming part hereof and in which Figure 1 is a side elevational view of the device.

Figure 2 is a longitudinal sectional view, with the handle removed.

Figure 3 is a detail side view of the keX- pansible sleeve which bears againsty the rollers.

Figure 4 is a longitudinal" sectional View of the device and illustrating a modification thereof; and v Figure 5 is a cross-sectional view of the device as illustrated kin Figure 1.

Continuing the description of the invention, and referring to the several parts in detail; the device has a shaft 1, threaded at its ends 2 and 2a and provided with end members 3 3. These end members have annular grooves 4-4 wherein are arranged to ride a plurality of rollers 5-5 and which bear against the metal to be worked upon.

In Figure 2 the shaft 1 is clearly shown, and is somewhat conical in shape and upon one end 2a, is screwed a nut 6 of a conical formation and which is passed through the end member 8. This nut 6 has its end member resting against a sleeve 7, clearly shown in Figure 3, the inside 'diameter of the sleeve 'being graduated to conformably receive the cone shaped shaft l.l The sleeve has a spiral groove 8 around its body from end to end Vfor the purpose of making it resilient,'so that when pressure is brought against it l:by inserting a -pin .in holes 8 and advancingV `the .nut 6, the sleeve `will be pressed outward against vthe rollers .5-'5. The nut "6, as will be seen-by referenceto Figure v1, has a-scale 9, adapted'to register with ,a like scale 10.011 the'end '2a ofthe shaft 1, .by means of; which ian. accurateV vsetting Aof the tool may belrad. Another' nut 1()a on they end 2 ofxthe shaft is also providedfor i' `moving the lsleeve against' the rollersl at'lthis end. Both nuts 6 and 10Fliaveoppositely arranged threads to prevent their unscrewing whenv the device is in operation. The opposite end 2 of the shaft is squared for a handle 11.

In Figure 4 is illustrate-d a modification of the device. Inv this form the shaft l is larger and the rollers 5 5 are of larger' diameter at one end, to conformably bear against the shaft. No sleeve is provided in this case, and the rollers are secured by small adjusting screws 12 to the end members 3 3, to retain Vthem on an even axis. The end `members 3-'3 have flanges `13--13 against which the rollers bear. A nut 14, when retracted, will permit nut-6 to be advanced, thus moving the end 2 outward and pressingV the shaft against therollers .5.

In operation, the device is placed in a bearing by separating the two parts of the bearing and the nuts kmoved to proper adjustment for the -bearing to be worked upon. The handle 11 1s then turned which will cause the shaft to rotate and will rotate the rollers is to wear away the j metal in aV smooth, uniform and neat manner.

lVhat is claimed is:

1. A device for burnishing, retitting and gauging bearings ofl Babbitt or other soft eoV y y 'l veo rollers againstthe metal. The action ci the mandrel; a nut disposed on the threaded portion of one end of the mandrel Vand'l having a flange thereon extending through the bore. of one of said circular plates and impinging one end of said expansible sleeve,

CII

cluding aV mandrel having a tapered bod)7V portion and integral threaded end portions, a plurality of elongated rollers radially disposed around said mandrel; means for hold.

ing the rollers in alinement, one with the other, included with'means for increasing and decreasing `the `hurnishing diameter of the rollers; means forrrdetermining u the hnrnishing action of said rollers on a bearing and means on one endot said mandrel for applying an operatinghandle thereto.

3. A hurnishi-ng tool having, in combination, a mandrelV having threaded'end portions, a cage through which the mandrel eX- tends comprising end plates, a plurality of hurnishing rolls movably confined between the end plates, a nut threaded `on each opposite rdirectionsg; f.

4. A hurnishlng tool havlng, 1n comblna- Y outward andv inward when the Amandrel is longitudinally adjusted throughthe cage ,in

tion, a tapered mandrel having threaded end portions, a cage through which the mandrel extendsl comprising annular end plates, a

plurality of burnishing rolls movably oon- Y finedY between Ythe end plates, and a nut threaded on Aeaohvthreaded end of the manf drel, adjustment off the nuts being'adapted to: effect longitudinal adjustment.4 of the mandrel through the cage in opposite direetions,V whereby the vrolls are/adapted tobe vmoved outward and inward when the mandrellis longitudinally Y'adjusted through the cage in opposite directions. u ,Y

In Vtestimony whereof I have signed my Vname to this specification.

CHARLES n DE WITT.

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